CN113915196A

CN113915196A - Variable damping type hydraulic vibration excitation device

Info

Publication number: CN113915196A
Application number: CN202111163965.9A
Authority: CN
Inventors: 廖湘平; 魏杰; 阳帅; 胡东; 谢平光
Original assignee: Loudi Guanghua Machinery Manufacturing Co ltd; Hunan University of Humanities Science and Technology
Current assignee: Loudi Guanghua Machinery Manufacturing Co ltd; Hunan University of Humanities Science and Technology
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2022-01-11

Abstract

The embodiment of the invention discloses a variable damping type hydraulic vibration excitation device. The variable damping type hydraulic vibration excitation device is provided with the variable damping device at a first channel on the cylinder barrel for controlling the flow of liquid passing through the first channel, so that the movement speed of the piston rod can be conveniently controlled, the vibration speed of the vibration excitation device is further conveniently controlled, the variable damping type hydraulic vibration excitation device can be applied to various working condition requirements, and the application range is widened.

Description

Variable damping type hydraulic vibration excitation device

Technical Field

The invention relates to the technical field of hydraulic pressure, in particular to a variable damping type hydraulic vibration excitation device.

Background

In recent years, due to the advantages of stepless amplitude modulation, frequency modulation, system simplification, convenient operation and the like, the hydraulic vibration excitation device is increasingly applied to many engineering machines, such as mining machines, construction machines, loading machines, vibration forming machines and the like. However, the current hydraulic vibration excitation device cannot accurately and precisely control the displacement or the speed of the device, and one hydraulic vibration excitation device can only adapt to the requirement of a single working condition, so that the application range is small.

Disclosure of Invention

In order to overcome at least some defects or shortcomings in the prior art, the embodiment of the invention provides the variable damping type hydraulic vibration excitation device, which can conveniently control the movement speed of the piston rod, further conveniently control the vibration speed of the vibration excitation device, can be applied to various working condition requirements, and improves the application range.

Specifically, an embodiment of the present invention provides a variable damping hydraulic excitation device, including: a cylinder barrel; the first cylinder cover is connected to one end of the cylinder barrel; the second cylinder cover is connected to the other end of the cylinder barrel; a piston rod, comprising: the piston is arranged in the cylinder barrel and is positioned between the first cylinder cover and the second cylinder cover; the first piston rod is connected to one side of the piston and penetrates through the first cylinder cover; the second piston rod is connected to the other side of the piston and penetrates through the second cylinder cover; the piston, the cylinder barrel, the first cylinder cover and the first piston cylinder form a first inner cavity, and the piston, the cylinder barrel, the second cylinder cover and the second piston cylinder form a second inner cavity; the cylinder barrel is provided with a first channel arranged along the axial direction of the cylinder barrel, two ends of the first channel are communicated with the inside of the cylinder barrel, the cylinder barrel is also provided with a damping mounting hole, the damping mounting hole is communicated with the first channel, and a variable damping device is arranged in the damping mounting hole to control the flow of the first channel; the piston is provided with a second channel and a third channel, one end of the second channel is communicated with one end of the third channel, the other end of the second channel penetrates through the outer wall of the piston along the radial direction of the piston, when the piston reciprocates in the cylinder barrel, the second channel can be communicated with one end of the first channel, and the other end of the third channel is communicated with the first inner cavity; a fourth channel, a fifth channel and a sixth channel are arranged on the first piston rod, the fourth channel is communicated with the fifth channel and the sixth channel, the fourth channel extends towards the piston from a first end face of one end, far away from the piston, of the first piston rod, and the fifth channel extends along the radial direction of the first piston rod and penetrates through the outer wall of the first piston rod; the sixth channel extends along the radial direction of the first piston rod and penetrates through the outer wall of the first piston rod, the sixth channel is communicated with the first inner cavity, and a first one-way valve is further arranged in the sixth channel; a seventh channel, an eighth channel and a ninth channel are arranged on the second piston rod, the seventh channel is communicated with the eighth channel and the ninth channel, the eighth channel extends from a second end face of one end, far away from the piston, of the second piston rod to the piston, and the eighth channel extends along the radial direction of the second piston rod and penetrates through the outer wall of the second piston rod; the ninth channel extends along the radial direction of the second piston rod and penetrates through the outer wall of the second piston rod, the ninth channel is communicated with the second inner cavity, and a second one-way valve is further arranged in the ninth channel.

In one embodiment of the present invention, the third passage is provided in an axial direction of the first piston rod; one end, adjacent to the piston, of the first cylinder cover is provided with a first protruding part, and the radius of the first protruding part in the radial direction of the first cylinder cover is smaller than the distance from the third channel to the center line of the piston; and one end of the second cylinder cover, which is adjacent to the piston, is provided with a second protruding part, and the radius of the second protruding part in the radial direction of the cylinder cover is smaller than that of the cylinder barrel.

In one embodiment of the invention, a groove is formed in the inner wall of the cylinder barrel, the groove is circumferentially arranged along the inner wall, and one end, adjacent to the first cylinder cover, of the first channel is communicated with the groove.

In one embodiment of the present invention, the fourth passage is provided in an axial direction of the first piston rod; the seventh passage is provided along an axial direction of the second piston rod; the sixth passage is disposed between the piston and the fifth passage, and the ninth passage is disposed between the eighth passage and the piston.

In one embodiment of the invention, the minimum distance from the first cylinder head to the piston adjacent to the third end surface of the piston is equal to the minimum distance from the center line of the fifth passage to the piston, and the minimum distance from the second cylinder head to the piston adjacent to the fourth end surface of the piston is equal to the minimum distance from the center line of the eighth passage to the piston.

In an embodiment of the present invention, the number of the fifth passages is plural, and the plural fifth passages are distributed at intervals along the axial direction of the first piston rod; the number of the eighth channels is multiple, and the multiple eighth channels are distributed at intervals along the axial direction of the second piston rod.

In one embodiment of the invention, the variable damping device is an adjustable throttle.

The technical scheme can have one or more of the following advantages and beneficial effects: according to the embodiment of the invention, the variable damping device is arranged at the first channel on the cylinder barrel and is used for controlling the flow of the liquid passing through the first channel, so that the movement speed of the piston rod can be conveniently controlled, the vibration speed of the vibration excitation device can be further conveniently controlled, the variable damping device can be applied to various working condition requirements, and the application range is expanded.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a variable damping hydraulic excitation device according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, an embodiment of the present invention provides a variable damping hydraulic excitation device 10. The variable damping hydraulic excitation device 10 mainly includes, for example, a first cylinder head 600, a second cylinder head 500, a cylinder tube 100, a piston rod 200, and the like.

Specifically, the cylinder 100 is, for example, a cylindrical component. The first cylinder head 600 is connected to one end of the cylinder tube 100 by, for example, a screw connection or a snap-key connection, and the second cylinder head 500 is connected to the other end of the cylinder tube 100 by, for example, a screw connection or a snap-key connection. The first cylinder head 600 and the second cylinder head 500 are, for example, disk-shaped components.

The piston rod 200 includes, for example, a piston 210, a first piston rod 220, and a second piston rod 230230. The piston 210 is disposed in the cylinder tube 100 and between the first cylinder head 600 and the second cylinder head 500. The piston 210 is a cylindrical component, and the outer cylindrical wall of the piston 210 is disposed in sealing engagement with the inner wall of the cylinder 100. The first piston rod 220 and the second piston rod 230 are, for example, elongated rod-shaped. The first piston rod 220 is connected to one side of the piston 210 by, for example, a screw connection method, a welding connection method, or the like, and penetrates the first cylinder head 600. The second piston rod 230 is connected to the other side of the piston 210 by a screw connection method, a welding connection method, or the like, and penetrates the second cylinder head 500. The first piston rod 220 and the second piston rod 230 may also be integrally formed with the piston 210 as a single piston rod, which is not limited herein.

The piston 210, the cylinder 100, the first cylinder head 600, and the first piston rod 220 form a first inner chamber SP1, and the piston 210, the cylinder 100, the second cylinder head 500, and the second piston rod 230 form a second inner chamber SP 2.

As shown in fig. 1, the cylinder tube 100 is provided with a first passage 110 arranged in an axial direction of the cylinder tube 100 (e.g., a horizontal direction in fig. 1). Both ends of the first passage 110 are respectively communicated with the inside of the cylinder 100. The cylinder barrel 100 is further provided with a damping mounting hole 120, one end of the damping mounting hole 120 is communicated with the first channel 110, the damping mounting hole 120 is arranged along a radial direction (e.g., a vertical direction in fig. 1) of the cylinder barrel 100, for example, and the other end of the damping mounting hole 120 penetrates through an outer wall of the cylinder barrel 100. A variable damping device 300 is provided in the damping mounting hole 120 to control the flow rate of the liquid passing through the first passage 110. Further, the variable damping device 300 is, for example, an adjustable throttle or other hydraulic valve capable of controlling the flow rate.

In addition, the piston 210 is provided with a second passage 221 and a third passage 222. One end of the second channel 221 communicates with one end of the third channel 222, and the other end of the second channel 221 penetrates through the outer wall of the piston 210 in a radial direction (vertical direction in fig. 1) of the piston 210. When the piston 210 reciprocates in the cylinder 100, the second passage 221 may communicate with one end of the first passage 110, and the other end of the third passage 222 communicates with the first chamber SP 1.

A fourth channel 221, a fifth channel 222 and a sixth channel 223 are arranged on the first piston rod 220, the fourth channel 221 communicates with the fifth channel 222 and the sixth channel 223, the fourth channel 221 extends from a first outer end of one end of the first piston rod 220 far away from the piston 210 to the piston, and the fifth channel 222 extends along the radial direction of the first piston rod 220 and penetrates through the outer wall of the first piston rod 220; the sixth channel 223 extends along the radial direction of the first piston rod 220 and penetrates through the outer wall of the first piston rod 220, the sixth channel 223 is communicated with the first inner cavity, and a first one-way valve 400 is further arranged in the sixth channel 223.

A seventh channel 231, an eighth channel 232 and a ninth channel 233 are arranged on the second piston rod 230, the seventh channel 231 is communicated with the eighth channel 232 and the ninth channel 233, the eighth channel 232 extends from a second outer end surface of one end of the second piston rod 230 far away from the piston to the piston, and the eighth channel 232 extends along the radial direction of the second piston rod 230 and penetrates through the outer wall of the second piston rod 230; the ninth passage 233 extends in the radial direction of the second piston rod 230 and penetrates the outer wall of the second piston rod 230, the ninth passage 233 communicates with the second inner cavity SP2, and a second one-way valve 700 is further disposed in the ninth passage 233.

In the embodiment of the invention, the variable damping device 300 is arranged at the first channel 110 on the cylinder barrel 100 and is used for controlling the flow rate of the liquid passing through the first channel 110, so that the movement speed of the piston rod 200 can be conveniently controlled, the vibration speed of the vibration excitation device can be conveniently controlled, the vibration excitation device can be applied to various working condition requirements, and the application range is expanded.

Further, the third channel 222 is provided in the axial direction of the first piston rod 220. One end of the first cylinder cover 600 adjacent to the piston 210 is provided with a first protruding part 610, and the radius of the first protruding part 610 in the radial direction of the first cylinder cover 600 is smaller than the distance from the third channel 222 to the center line of the piston 210. One end of the second cylinder head 500 adjacent to the piston 210 is provided with a second protrusion 510, and a radius of the second protrusion 510 in a radial direction of the second cylinder head 500 is smaller than a radius of the cylinder tube 100.

In other embodiments of the present invention, as shown in fig. 1, a groove 130 is disposed on an inner wall of the cylinder tube 100, the groove 130 is disposed circumferentially along the inner wall, and an end of the first channel 110 adjacent to the first cylinder head 600 communicates with the groove 130.

Further, the fourth channel 221 is disposed along the axial direction of the first piston rod 220, and the seventh channel 231 is disposed along the axial direction of the second piston rod 230; the sixth passage 223 is disposed between the piston 210 and the fifth passage 222, and the ninth passage 233 is disposed between the eighth passage 232 and the piston.

Furthermore, the minimum distance from the third end surface of the first cylinder cover 600 adjacent to the piston 210 is equal to the minimum distance from the center line of the fifth passage 222 to the piston 210, and the minimum distance from the fourth end surface of the second cylinder cover 500 adjacent to the piston 210 is equal to the minimum distance from the center line of the eighth passage 232 to the piston 210, so that when the cylinder cover (one of the first cylinder cover 600 and the second cylinder cover 500) on one side of the piston 210 just completely blocks the passage (one of the fifth passage 222 and the eighth passage 232) on the same side as the piston 210, the cylinder cover (the other of the first cylinder cover 600 and the second cylinder cover 500) on the other side of the piston 210 can just completely leave the passage (the other of the fifth passage 222 and the eighth passage 232) on the same side as the piston 210.

In addition, the number of the fifth passages 222 is plural, and the plural fifth passages 222 are distributed at intervals along the axial direction of the first piston rod 220; the number of the eighth passages 232 is plural, and the plural eighth passages 232 are distributed at intervals along the axial direction of the second piston rod 230. Preferably, the plurality of fifth passages 222 are uniformly distributed along the axial direction of the first piston rod 220. The plurality of eighth passages 232 are uniformly distributed along the axial direction of the second piston rod 230.

In the reciprocating process of the cylinder barrel 100, the first channel 110, the variable damping device 300, the groove 130, the second channel 221 and the third channel 222 form an internal oil leakage path of the variable damping type hydraulic vibration excitation device in the embodiment of the invention.

When the first cylinder head 600 completely covers the fifth passage 222, the second cylinder head 500 is just completely clear of the eighth passage 232. The oil enters the third passage 221 from the first outer end surface of the first piston rod 220, and then enters the first chamber SP1 along the sixth passage 223 and the check valve 400. At this point, the bore 100 begins to move to the left, the first head 600 begins to move away from the fifth passage 222, and the second head 500 begins to cover the eighth passage 232.

When the cylinder tube 100 continues to move, the second cylinder head 500 completely covers the eighth passage 232 and the cylinder tube 100 stops moving. At this point, when the second cylinder head 500 just completely covers the eighth passage 232, the first cylinder head 600 just completely leaves the fifth passage 222.

When the hydraulic system switches the oil direction, the oil enters the seventh passage 231 from the second outer end surface of the second piston rod 230, and then enters the second cavity SP2 along the ninth passage 233 and the check valve 700 in sequence. At this time, the cylinder tube 100 starts moving rightward, the second cylinder head 500 starts to be away from the eighth passage 232, the first cylinder head 600 starts to cover the fifth passage 222, and since the check valve has a one-way conduction characteristic, the working oil of the second cavity SP2 cannot enter the first cavity SP1 of the hydraulic cylinder since the internal oil drainage path cannot be conducted.

As the cylinder 100 continues to move, the oil continues to enter the seventh passage 231 from the second outer end surface of the second piston rod 230, and then enters the second chamber SP2 along the ninth passage 233 and the check valve 700. When the cylinder 100 moves to the first head 600 completely covers the fifth passage 222, the cylinder 100 stops moving.

Thereby, the variable damping hydraulic excitation device 10 completes one cycle motion. By high-frequency reversing of oil liquid in the hydraulic working system, the variable damping hydraulic vibration excitation device 10 realizes small-amplitude high-frequency linear reciprocating motion, and drives an external load to realize high-frequency vibration.

It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition. Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A variable damping hydraulic excitation device, comprising:

a cylinder barrel;

the first cylinder cover is connected to one end of the cylinder barrel;

the second cylinder cover is connected to the other end of the cylinder barrel;

a piston rod, comprising:

the piston is arranged in the cylinder barrel and is positioned between the first cylinder cover and the second cylinder cover;

the first piston rod is connected to one side of the piston and penetrates through the first cylinder cover;

the second piston rod is connected to the other side of the piston and penetrates through the second cylinder cover;

the piston, the cylinder barrel, the first cylinder cover and the first piston cylinder form a first inner cavity, and the piston, the cylinder barrel, the second cylinder cover and the second piston cylinder form a second inner cavity;

the cylinder barrel is provided with a first channel arranged along the axial direction of the cylinder barrel, two ends of the first channel are communicated with the inside of the cylinder barrel, the cylinder barrel is also provided with a damping mounting hole, the damping mounting hole is communicated with the first channel, and a variable damping device is arranged in the damping mounting hole to control the flow of the first channel;

the piston is provided with a second channel and a third channel, one end of the second channel is communicated with one end of the third channel, the other end of the second channel penetrates through the outer wall of the piston along the radial direction of the piston, when the piston reciprocates in the cylinder barrel, the second channel can be communicated with one end of the first channel, and the other end of the third channel is communicated with the first inner cavity;

a fourth channel, a fifth channel and a sixth channel are arranged on the first piston rod, the fourth channel is communicated with the fifth channel and the sixth channel, the fourth channel extends towards the piston from a first end face of one end, far away from the piston, of the first piston rod, and the fifth channel extends along the radial direction of the first piston rod and penetrates through the outer wall of the first piston rod; the sixth channel extends along the radial direction of the first piston rod and penetrates through the outer wall of the first piston rod, the sixth channel is communicated with the first inner cavity, and a first one-way valve is further arranged in the sixth channel;

a seventh channel, an eighth channel and a ninth channel are arranged on the second piston rod, the seventh channel is communicated with the eighth channel and the ninth channel, the eighth channel extends from a second end face of one end, far away from the piston, of the second piston rod to the piston, and the eighth channel extends along the radial direction of the second piston rod and penetrates through the outer wall of the second piston rod; the ninth channel extends along the radial direction of the second piston rod and penetrates through the outer wall of the second piston rod, the ninth channel is communicated with the second inner cavity, and a second one-way valve is further arranged in the ninth channel.

2. The variable damping hydraulic excitation device according to claim 1, wherein the third passage is provided in an axial direction of the first piston rod; one end, adjacent to the piston, of the first cylinder cover is provided with a first protruding part, and the radius of the first protruding part in the radial direction of the first cylinder cover is smaller than the distance from the third channel to the center line of the piston; and one end of the second cylinder cover, which is adjacent to the piston, is provided with a second protruding part, and the radius of the second protruding part in the radial direction of the cylinder cover is smaller than that of the cylinder barrel.

3. The variable damping hydraulic excitation device as claimed in claim 1, wherein a groove is formed in an inner wall of the cylinder barrel, the groove is circumferentially formed along the inner wall, and one end of the first channel, which is adjacent to the first cylinder head, communicates with the groove.

4. The variable damping hydraulic excitation device according to claim 1, wherein the fourth channel is provided in an axial direction of the first piston rod; the seventh passage is provided along an axial direction of the second piston rod; the sixth passage is disposed between the piston and the fifth passage, and the ninth passage is disposed between the eighth passage and the piston.

5. The variable damping hydraulic excitation device as set forth in claim 1, wherein the minimum distance from the third end surface of the first cylinder head adjacent the piston to the piston is equal to the minimum distance from the centerline of the fifth passage to the piston, and the minimum distance from the fourth end surface of the second cylinder head adjacent the piston to the piston is equal to the minimum distance from the centerline of the eighth passage to the piston.

6. The variable damping hydraulic excitation device according to claim 1, wherein the number of the fifth passages is plural, and the plural fifth passages are spaced apart in the axial direction of the first piston rod; the number of the eighth channels is multiple, and the multiple eighth channels are distributed at intervals along the axial direction of the second piston rod.

7. The variable damping hydraulic excitation device as defined in claim 1 wherein the variable damping device is a variable throttle.